Attachment for boiler-tubes.



W. E. THOMPSON.

ATTACHMENT FOR BOILER TUBES.

APPLICATION FILED JAN. 8, 1913.

1,077,441 Patented Nov. 4, 1913.

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cnrrnn erm ne PATENT onnron.

WALTER E. THOMPSON, OF CHESTER, PENNSYLVANIA.

ATTACHMENT FOR BOILER-TUBES.

To all whom 2'25 may concern:

Be it known that I, WALTER E. THOMP- SON, a citizen of the United States, residing at Chester, in the county of Delaware and State of Pennsylvania, have invented certain new and useful Improvements in Attachments for Boiler-Tubes, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to attachments for boiler tubes and has for its primary object to provide a device which may be easily and quickly attached to or detached from the end of a boiler tube, whereby the greater part of the heat units which are now wasted by contact with the head sheet of the boiler, are directed into and through the fire tubes, thus greatly intensifying the heat within said tubes.

Another and more specific object of the invention resides in the provision of a device of the above character constructed of two sections which may be quickly clamped upon the bead turned on the end of the boiler tube, each of said sections having a coating of heat-resisting material applied thereto.

A still further object of the invention is to provide a device for directing the products of combustion from the furnace of the boiler into the fire tubes which is constructed of cast metal and may therefore be produced at comparatively small cost, said device being also extremely durable in use and highly etficient for the purposes in view.

lVith the above and other objects in view as will become apparent as the description proceeds, the invention consists in certain constructions, combinations and arrangements of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawings, in which- Figure l is an end elevation of a portion of a boiler showing a plurality of the boiler tubes and my attachments applied to the ends of adjacent tubes. Fig. 2 is a section taken on the line 22 of Fig. 1; and Fig. 3 is a section taken on the line 33 of Fig. 1.

Referring in detail to the drawings, 5 designates the head of a boiler and 6 the fire tubes, the ends of which are secured therein. These boiler tubes are secured in the Specification of Letters Patent.

Application filed January 8, 1913.

Serial No. 740,889.

: head sheet in the usual manner by turning the beads 7 thereon face of the head.

My improved attachment consists of two similar sections designated by the numeral 8, said sections being preferably formed of stove metal and each cast in one piece. These sections are formed with bent or curved walls 9, and said walls taper longitudinally as shown in Fig. 2, so that when assembled, they constitute a gradually widening or flaring mouth projecting from the face of the boiler head. At its inner end, each section of the attachment is with a concavo-convex flange or bead 10 which is adapted to engage or be seated upon the bead 7 upon the end of the boiler tube. These sections are further provided upon their longitudinal edges and approximately midway between their inner and outer ends with the laterally projecting ears 11 which are apertured to receive the bolts 12. Clamping nuts 13 are threaded upon the ends of these bolts whereby the sections of the attachment may be securely clamped upon the ends of the boiler tubes.

Each of the sections 8 is provided with a coating of heat-resisting material indicated at 14:. This material may consist of a plastic mixture of asbestos fiber and white lead of about the consistency of paint. The sections are dipped into this composition, and set aside until the same dries or hardens upon the walls of said sections. This heatresisting material protects the attachment and prevents the same from being destroyed by the intense heat of the boiler furnace.

Attention is now directed to Fig. 1 of the drawings, wherein it will be noted that the attachments when applied to adjacent tubes, have their opposed sides disposed contiguone so that they practically close the space between the adjacent tubes. The outwardly flaring walls of the attachments direct the flame and products of combustion from the boiler furnace into the ends of the tubes 6, whereby a maximum percentage of heat units is obtained from a minimum consumption of fuel. It will of course be understood that the proportions of the attachment will vary in accordance with the size of the boiler tube to which it is to be applied and the capacity of the boiler.

From the foregoing, it is thought that the construction and manner of application of my improved boiler tube attachment will be which engage the outer Patented Nov. 4, 1913.

fully understood. The flaring walls of the device prevent the flame from contacting with the surface of the boiler head between the tubes and serve to direct this flame into the tube. A very material saving in the consumption of fuel is thus effected, as this wasted heat which is of no inconsiderable amount, is saved, and utilized by passing the same through the fire tubes for the generation of steam.

It Will be seen that the use of my attachment requires no alterations whatever in the construction of the boiler or the manner of attachment of the ends of the tubes to the boiler heads. The device may also be easily and quickly arranged in operative position or removed from the tubes, and owing to the fact that the same is constructed of cast metal, it will be obvious that the invention can be produced at small manufacturing cost.

While I have shown and described what at the present time is deemed to be the preferred embodiment of the invention, it will be understood that the same is susceptible of considerable modification in the form, proportion and construction thereof without departing from the essential features or sacriicing any of the advantages of the inven tion.

Having thus described the invention, what is claimed is:

1. The combination with a boiler tube having a bead turned on its end, of a device having opposed parallel walls and convergently disposed walls connecting said parallel walls, a concavo-convex flange formed upon 1 one end of the device and adapted to be seated upon the bead at the end of the boiler tube and means for removably clamping 1 said flange to the bead of the boiler tube.

2. An attachment of the character described comprising two similarsections, a concave-convex flange formed upon one end of each of said sections, and adapted for engagement with the end of the boiler tube, said sections having outwardly flaring side i walls, perforated ears formed upon the v longitudinal edges of each of said sections, bolts removably arranged within said ears and clamping nuts threaded upon the ends 1 of said bolts whereby said sections are securely clamped to the end of the boiler tube.

i of a boiler,

3. The combination with a boiler tube havits end, of a sectional attachment for directing the flame and products of combustion into said tube, said at tachment having opposed walls converging inwardly to the mouth of the tube, said sections being each provided with means for engagement upon the bead of the boiler tube, perforated ears formed upon the longitudinal edges of said sections, bolts removably mounted in said ears and clamping nuts mounted upon said bolts whereby the sections are securely clamped together upon said bead.

mg a bead turned on 4.:The combination with a boiler tube having a bead turned on its end, of a sectional attachment for directing the flame and products of combustion in said tube,

said attachment having opposed walls converging inwardly to the mouth of the tube, a concavo-convex flange formed upon the inner end of said attachment and adapted to be seated upon the bead of the boiler tube, perforated ears formed on the longitudinal edges of each of said sect-ions, bolts removably arranged within said ears and clamping nuts mounted upon said bolts whereby said sections are securely clamped together upon said bead.

5. The combination with the fire tubes of asectional attachment for directing'the' flame and products of combustion thereto, said attachment including opposec'i side walls converging inwardly to the end of the tube, the attachment upon the ends of adjacent tubes having their opposed walls at their outer ends disposed closely adjacent to each other, a concavoeconvex flange formed upon the ment and adapted to be seated upon the end of the boiler tube, ears formed upon the longitudinal edges of each of said sections, and means for clamping said ears together whereby said sections will be securely clamped to the end of the boiler tube.

In testimony whereof I hereunto ailix my signature in the presence of two witnesses.

WALTER E. THOMPSON.

Witnesses:

James M. Tnonrson, I'IARRY R. VVRIGHT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner offatenti Washington, D. C.

inner end of said attach- 

